Service equipment for aviation fields



July 26, 1932. C.,P. GRlFFlTH ET AL 1,368,497

SERVICE EQUIPMENT FOR AVIATION FIELDS Filed May 9, 1928 5 Sheets-Sheet 1 July 26, 1932. c. P. GRIFFITH ET AL SERVICE EQUIPMENT FOR AVIATION FIELDS F iled May 9, 1928 5 Sheets-Sheet 2 I II I T i II 27 2;)? fins dzfg July 26, 1932. c. P. GRIFFITH ET AL SERVICE EQUIPMENT FOR AVIATION FIELDS Filed May 9, 1928 5 Sheets-Sheet 3 July-26, 1932. c. P. GRIFFITH ET AL SERVICE EQUIPMENT FOR AVIATION FIELDS Filed May 9, 1928 5 Sheets-Sheet 4 July '26, 1932. c. GRIFFITH ET AL 1,868,497

SERVICE EQUIPMENT FOR AVIATION FIELDS Filed May 9, 1928 5 Sheets-Sheet 5 a W WM Patented July 26, 1932 I UNITED STATES,

PATENT OFFICE I. GRIFFITH AND CHARLES J. WOBDEN, OI FORT WAYNE, INDIANA, AS- SIGNOBS TO 8. I. BOWBEB & COMPANY, INC 01' FORT WAYNE, INDIANA, A CORPORA- TION F INDIANA SERVICE EQUIPMENT FOR AVIATION FIELDS Application filed Kay 9, 1928. Serial No. 276,228.

Our invention relates 'in general to dispensing apparatus and has particular reference to an improved system and operating equipment therefor for servicin aeroplanes at air ports or aviation fields w ereby aeroplanes may be serviced with either fuel, oil, air or water, or all of them, without the inconvenience, loss of time and undue manual labor that has been necessary with heretofore practiced methods.

As heretofore practiced at aviation fields or air ports, it has usually been customary to convey gasoline by means of a wheel tank or even buckets from a storage tank to the aeroplane and the same is also true with respect to water and oil. These old methods have resulted in considerable loss of time, unnecessary labor and expense, due mostly to the fact that it has not been practical to bring the aeroplane within areasonable distance of the ordinary storage facilities for the gasoline, water and oil. a

The primary object of our invention is to rovide an equipment for supplying oil, gasoine, and water, and even air for the tires of the aeroplane, at a location on the landing field which will be conveniently accessible to the aeroplanes so that it will be no. longer necessary to carr the water, oil and gasoline, to the aeroplane y means of the old unsatisfactory bucket bri ade.

Still another ob ect of our invention is to so arrange the equipment, particularly the service station, as we will call it for convenience, that it will in no wa interfere with the o erations of the lan ing field even thong the same happens to be located within that area of the landin field upon which the aeroplanes land and taEe ofi.

A further object of the invention is to provide an equipment of the character described in which a pluralit of service pits may be distributed over a old area or arranged in multiple series at a desired location in the source.

A still further object of the invention is to field area, and all supplied from a common mally subject to wet conditions due to rains or other causes.

Other objects of the invention will hereina fter appear, the novel features and combinatlons being set forth in the appended claims.

In the accompanying drawings Fig. 1 is a diagrammatic View showing the system of laying out our equipment and'with the important parts of the same illustrated in elevation;

Fig 2 is a view in side elevation of the serviclngl pit and the apparatus associated therewlt Fig. 3 is a top plan view of the servicing pit and the apparatus associated therewith;

F g. 4 is an end view in elevation of the servlcing pit and the apparatus associated therewith;

Fig. 5 is a detail perspective view of a portion of the box for the servicing pit;

Fig. 6 is a detail view in cross section of .one of the hose reels used in combination with the servicing pit, viewing the same from the end;

Fig. 7 is a detail view in cross section of the same reel shown in Fig. 6 viewed from the side; and I Fig. 8 is a detail view in cross section of the pipe lines between the servicing pit and the supply station.

Referring now to the drawings in detail and particularly to Fig. 1, 5 represents the supply station or pump-house w ioh may be placed at any convenient location on the field; as an example, adjacent the hangars or in the same general location. of the hangars, perhaps not intimately'associated therewith, on account of fire hazards. As a matter of fact, the location of the pump house or supstated, at some convenient location on the landing field is a servicin pit 8 which will be hereinafter more fully escribed.

Now, the idea is to supply the servicing pit 8 with gasoline from the storage tank 6 and lubricating oil from thestorage tank 7 and to further supply the pit with air and water connections. A. servlcing pit so supplied may be very conveniently used to service aeroplanes especially when it is located at a convenient place on the field-where the aeroplane may be taxied up to it and there serv- I pipe 13 connects the vent pipe 11 with an air release device 14 and a similar cross pipe 15 connects the vent pipe 12 with an air release device 16. A suitable gasoline pum 17 is used for pumping the gasoline from t e tank 6, the same being connected at its intake end.

with a pipe 18, and with its outlet end con nected to a pipe line 19'. A gasoline by-pass ,pipe 20 connects the pipe line 19 and the filling pipe 9. This by-pass being provided with a control valve 21. The pipe 19 extends to i the air release 14, then into the top of a sep- 'arator 22, out of the separator, through the door 23 of the house, through the ground, to the servicing pit 8 The oil from the tank 7 is handled in a similar manner; that is to say, it is pumped by means of a pump 24 from the tank 7, through a pipe 25, out the outlet side of the pump, into the air release ,16, through the same, and through the supply pipe 26, to the servicing pit. An oil b -pass 27 communicates with the pipe at t e outlet side of the pump 24 and the filling pipe 10. The pump 24 may be electrically operated and controlled by amagnetic switch, generally represented as at 28 and the gasoline pump may be electrically operated and controlled by a magnetic switch, generally represented as at 29; The water to the servicing, pit may be supplied through a pipe 30 and air to the pit may be su plied through the pipe 31.

Due to the act that'the water pipe, the oil pipe, and, for that matter, all of the pipes extend through the ground, and, in cold weather, some difiiculty may be experienced with freezing of the water and congealing of the oil unless provision is made to take care of this condition, we have provided a steamheated conduit 32, see Figs. 1 and 8, for protecting the water pipe 30 and the oil pipe 26.

This conduit is'equipped with a steam line' 33'and a return steam line 34. The gaseline pipe 19 and the air pipe 31'do not necessarily ave to be so protected and we have therefore shown them on the outside of the steam-heated conduit.

Since it is desirable to equip the pit 8 with controlling switches operating in conjunction with 'the magnetic switches 28 and '29, 35 and36 represent the electrical conduits carrying the circuit for the switches in the pit. These conduits are also shown in Fig. 8.

Referring now particularly to the servicing it 8, attention is directed to the remaining gures of the drawings. This pit, at least so far as concerns the embodiment thereof selected for illustration, is made of either sheet metal or a casting suitable for the pur pose and in the form of a boxlike inclosure having a bottom, side walls, and a top adapted to be opened and closed by suitable hinged lids 37, of which there may be two, three, four, or any number, according to the size of the pit. It may even be found desirable to use a'single covering lid. According illustration shown, there are three li s, each of which being separately hinged, as best illustrated in Fig. 5, by means of the ears 38 to which is pivotally connected the rods 39, the ends of which work throu 'hppenings in the ears on the inside of the ids 37.

The to of the boxlike inclosure for the pit is ma e with a frame 40 which divides the cover into a plurality of openings, each of which being closed byits respective lid, as best illustrated in Fig. 5, and the upstanding rims 41 around the respective openings are adapted to co-operate with the depending flanges 42 around the lids 37 to'make a waterproof, strong, durable, and reasonably tight to the fit for the lids 37 when they are closed over the openings.

The pit, as illustrated, is preferably em: bedded for its entire height 1n the ground, and it should not project any farther above the ground surface than is necessary to provide for an unobstructed free hinging movement of the lids 37. The purpose of this is to leave no obstruction on the field that the ground wheels of an aeroplane cannot freely run over. The fact that an aeroplane 'may' sometimes run over these pits accounts for the primary reason for making the box of the pit unusually strong and durable. The flanges 42 in this respect, as shown in the sectionalv views, leave no sharp corners around the pit which would be apt to puncture, cut or otherwise injure tires of the ground wheels of the aeroplane in running over the pit. The box of the pit may be anchored in the ground in any suitable manner and we suggest that cement be used around the pit, as at 43, so as to leave a level approach over the top of the pit and also to provide an anchor, so to speak, for the anchoring members 14st the top of the pit. Other setsof these anchoring rnem-.

bers 44 may be used below the surface, as illustrated. i

From the above, it will be seen that the construction of the boxlike inclosure including the bottom, side walls and cover, oifers a perfectly waterproof housing which will not only shed water but which will also exclude it from seeping in from the surrounding soil.

Referring now to the pit equipment, attention is particularly invited to the layout illustrated in plan in Fig. 3, and in which 45 generally represents the gasoline hose reel, 46 generally represents the air hose reel, 47 generally represents the oil hose reel, and 48-generally represents the water hose reel. Attention is also invited to the fact that these four reels are directly positioned beneath the openings which are uncovered by the lids 37 when they are swung into open position. In other I words, the lid at one end of the pit may be opened to uncover the gasoline hose reel 45, the intermediate lid may be opened to uncover the air hose reel 46, and the lid at the opposite end of the pit may be opened to expose the oil hose reel 47. It will thus be appreciated that while all of the hose reels may be exposed atone time if they are all re-' quired, if only gasoline is required, the gasoline hose reel need only be exposed.

It should be mentioned here, however, that, in some instances, it may be only necessary or desirable to equip the pit with a gasoline hose reel, leaving out the air, water and oil service. In this event, the pit of course would be made much smaller, in fact, just large enough to accommodate the gasoline hose reel and a single lid would serve for this purpose. The same is likewise true if gasoline and oil were only required.

To open the lids, the pull rings 49 on the top of each lid may be employed. These rings may be attached to bosses or the like 50 on the lid and the loose connection between the rings and bosses will enable'the rings to normally lie fiat upon the lids.

The pipe lines including the steam heated conduit, shown in Figs. 1 and 8, enter the pit from adjacent the bottom of the boxlike housing therefor, the gasoline pipe 19 enters the pit and extends in elbow sections and other lengths through a gasoline meter 51 to a swivelled pipe connection 52 in advance of the bearing 53 on one side of the reel. The reel is further journaled for rotation in a bearing 54 on its opposite side. A suitable hand valve 55 is provided for in advance of the gasoline meter 51 so that the gasoline to the reel may be cut off when desired.

Before referring to the connections for the other reels, attentlon is nowparticularly invited to Figs. 6 and-7 showing the detail construction of the gasoline reel 45. This reel is made up of two opposed disc-like sides 56 and 57, preferably of sheet metal or they may be, of course, cast. The interior of the reel is open through a plurality of openings 58 in these discs56 and 57. The drum 59 may also be made of sheet metal or it may be cast, and the same is confined between the discs 56 and 57 by means of a plurality of spaced rods 60 5 inside faces of the discs 56 and 57 and nuts (32 on the rods 60 clamp the discs to the drum. The pipe 19 communicates with the pipe section 53' which is mounted for rotation in the bearing 53. A'T-fitting 64 on the pipe 53 supports a radially extending branch pipe 65 which projects through the drum 59 with an L-fitting 66 thereon for accommodating the hose 67, the hose being wound around the drum as illustrated. In this way, gasoline from the pipe 19 is supplied to the hose 67.

The branch pipe 65 is clamped to one of the side discs of the reel by means of a U- strap 68 which is bolted as at 69 to the disc.

The shaft 63 is threaded into the T 64 and serves as an axle for the reel. It is journaled in the bearing 54. The shaft 63 is of solid cold roll steel and serves as a block for the T-fitting 64. As a balance or supporting medium for the reel, a branch pipe or the like 70 is connected by the T 71 to the shaft 63 adjacent the bearing 54. This balance or supporting pipe 70 extends radially within the drum and is clamped to the opposite disc 56 by means of the U-strap 72 and the bolts 73. lVere it not for this support or balance, the wear would be practically all on the bearing 53. The end of the hose 67 is equipped with a suitable handcontrolled valved nozzle, not shown, but similar to the one designated 101 in Fig. 2. The trunnioned support for the bearings 53 and 54 is illustrated as at 74 and 75. This support is mounted upon two parallel side frame members 76 which extend above the bottom of the box for the pit, as illustrated.

Now, assuming that an aeroplane has beentaxied up alongside of the pit and it is desired to fill the tank thereof with gasoline. The lid over the hose reel 45 is swung open. The service man may then throw a suitable switch 45 (Fig. 4) in the pit which closes the circuit to the magnetic switch 29 in the pump house or su ply station. This will set into operation the gasoline pump 17. Gasoline will then be pumped through the supply pipe 19 to the hose 67 on the gasoline hose reel. the hose, by simply pulling on the nozzle end thereof, may then fill the gasoline tank of the aeroplane, controlling the supply thereto by the hand-operated valve on the nozzle end of the hose. After the tank has been filled .the hose may be rewound upon the reel using the circular handle 76 on the side of the reel.

The switch 45 in the pit'for the remote control of the gasoline pump 17 in the pump The operator having unwoundhouse is then opened to effect the stopping of pump 17 The amount of gasoline. supplied to the aeroplane will be measured by the meter 51 and a record thereby kept of the quantity dispensed.

The oil supply pipe 26 enters the pit, ex-

tends through the oil metere77 at'the oppo-.

. site side thereof through the swiveled connection 78 to the axle pipe 79 which with the shaft 79' is journaled in the bearings 80 and 81. The reel 47 for the oil hose is con-' gasoline reel, throws an oil pump switch 47' in the pit which closes the circuit to the oil pump 24 in the pump house which pumps oil through the hose 84 as it ismeasured by the meter 77. The side of the oil hose reel is also provided with a circular handle 85- for windingthe hose upon the'reel. A suitable hand valve 77 may be located for cutting oil the oil to the hose reel.

The air pipe 31 enters the pit and extends through the swiveled connection 86 to the axle pipe 87 of the air hose'reel 46 and communicates with a hose'88 in the same manner asexplained with reference to the reels 45 and 47. The air under pressure as retained within the pump house 5 may thus be supplied to the air hose 88 for inflatin tires of the aeroplane. The air hose rec 46, as stated, is constructed in a manner simi- [lar to the gasoline hose reel but on a smaller scale.

the swiveled connection 93 to the axle pipe 94 of the water hose reel, a suitable valve 95 being employed in advance of the swivelled connection forcontrolling the water supply within the pit. The water hose reel 48 is constructed as explained with reference to the gasoline reel. It. is mounted with freedom of rotation in bearings 96 and 97 which in turn are supported by the frame members 98 and 99.

To prevent the pipe connections for. thewater from freezing within the pit and to alsoprevent the oil from congealing in the The bearings 89 and for this air hose essee pipe connections for it in the pit, in cold weather, the steam pipes which heat the conduit 32 extend into the pit for steam coils i In Fig. 2 is also shown, as at 101, onecfthe nozzles for the discharge end of the service hoses. It is shown in this particular instance as ap lied to the oil hose 84.

From the a o've, it will be readily seen that we have provided an equipment which may be protected from the weather and which may be placed at any convenient loca tion on an aviation field where aeroplanes may be serviced in a very convenient and practical manner without the necessity of carrying gasoline, water or oil comparativel-y long distances and yet without in any way interfering with the landing and take off facilities of the field.

Attention is also directed to the possibility of distributing a plurality of these service pits at different locations in a field area .and supplying the same from a pump house and supply base common to all, or the pits may be arpanged in multiple or multiple series and still supplied from a supply base common to all.

Obviously those skilled in the art may and we therefore do not wish to be restricted to the precise construction herein disclosed.

Having thus fully described and shown an embodiment of ouriinve'ntion, what we claim and desire to secure by Letters Patent of the United States is:

1. In equipment for servicing aeroplanes, the combination with a box-like housing adapted to be sunk in the ground in the aeroplane field, of a hose reel in. said housing comprising a drum-like structure, a shaft for the hose reel having one end supported in a journal bearing, a T-fitting on said shaft adjacent said journal bearing, a balancing pipe section connected to said T-fitting to extend radially therefrom, another T-fitting connected to said shaft near the opposite end thereof, another pipe extension connected to extend radially from said. second-named T-' fitting, a hose connected to said last-named pipe extension, a swivel connection to said second-named T-fitting, and a supply pipe lineconnected through said swivel connection to said hose.

2. In equipment, for servicing aeroplanes, the combination with a box-like housing adapted t9 be imbedded in theground of an airport with the upper edges of such housing approximately flush with the ground level, of a hose reel permanently located in said make various changes in the construction llltl izo 1,sos,497

tending balancing member on said shaft ad--' jacent said journal bearing, a T-fitting for the opposite end of said shaft, a pipe section connected to the opposite side of said T-fitting and journaled in the opposite bearing for the hose reel, a swivel connection on said v pipe section connectin the same with a supply pipe line, and a pipe extension also connected to said T-fitting and communicating with said pipe section, said pipe extension projecting radially of the hose reel and having a fitting on the endthereof for connecting the hose wound upon said reel.

3. In combination with an aeroplane landing, field across which aeroplanes are adapted to taxi, a supply station adjacent said field including a gasoline reservoir and a motor driven pump adapted to draw gasoline from said reservoir, a pit sunk in the ground of the landing field remote from said station, a cover for said pit adapted, when closed, to be substantially flush with the sur face of the field so asto ofier no obstruction to the free movement of an aeroplane over the field, and over the cover, said cover being adapted to be opened to give access to the pit, a gasoline dispensing apparatus permanently mounted in the pit normally below the cover level of the pit, said apparatus including a flexible hose having a valve-controlled dispensing nozzle and adapted to be permanently connected at one end by pipe connections passing through the pit and through the ground to the pump in the supply station, said hose nozzle and hose being constructed and arranged to be manually withdrawing from said pit for discharging gasoline to aeroplanes in various positions at said pit or relatively remote therefrom, and means mounted within said pit and electrical connections from' said means passing through the pit and ground and connecting with the pump motor in the supply station for starting and stopping the pump and whereby the dispensing operation may be controlled from the pit.

4. In combination with; an aeroplane landing field across which aeroplanes are adapted to taxi, a supply station adjacent said field including a gasoline reservoir and a motor driven pump adapted to draw gasoline from said reservoir, a pit sunk in the ground of the landing field remote from said station, a cover for said pit adapted, when closed, to be substantially flush with the surface of the field so as to offer no obstruction to the free movement of an aeroplane over the field and over the cover, said cover being adapted to be opened to give access to the pit, a gasoline dispensing apparatus mounted in the pit,

normally below the cover level of the pit, said apparatus including a meter disposed to be readable upon the opening of said cover and having permanent connections passing through the pit and through the ground to' the pump in the supply station, a flexible hose adapted normally to be stored in the pit and having one end thereof permanently connected to the meter and having the other end provided with a valve controlled nozzle, said hose being constructed and arranged to permit the hose and nozzle to be manually withdrawn from the pit for discharginggasoline to aeroplanes in various positions both near said pit and at a relatively remote point therefrom, switch mechanism mounted within said pit and electrical connections from said switch mechanism passing through the pit and ground and connecting with the pump motor and supply station for starting and stopping the pump, whereby the dispensing operation may be controlled from the pit and whereby the amount of gasoline dispensed may be determined.

5. In combination with an aeroplane landing field across which aeroplanes are adapted to taxi, a supply station adjacent said field including a gasoline reservoir and a motor driven pump adapted to drawgasoline from said reservoir, a pit sunk in the ground of the landing field remote from said station, a cover for said pit adapted, when closed, to be substantially flush with the surface of the field so as to ofi'er no obstruction to the free movement of an aeroplane over the field and over the cover, said cover being adapted to be opened to give access to the pit, a gasoline dispensing apparatus mounted in the pit normally below the cover level of the pit, said apparatus including a reel turnably mounted in said pit and adapted to receive a coiled hose thereon, the pivotal axis of said reel including a gasoline conduit having a permanent connection with one end of said hose and the opposite end of said hose on said reel having a manually controlled valve nozzle, and gasoline connections from said gasoline conduit of said reel axis passing through said pit and under ground to the discharge side of said pump in the supply statlon, motor controlling means in said pit and electric connections therefrom passing through said pit and under ground to the pump motor in said supply station, whereby the dlSPBIlSlIlg operation may be wholly controlled from said pit, said nozzle and said hose being adapted to be manually withdrawable from said pit when the cover is opened to permit asoline to be dispensed to aeroplanes locate either adjacent to or relatively remote from'said it. P 6. In combination with an aeroplane landing field across which aeroplanes are adapted to taxi, a supply station adjacent said field including a gasoline reservoir and a motor driven pump adapted to draw gasoline from said reservoir, a pit sunk in the ground of the'landing field remote from said station, a-

ed and arranged to swing upwardly to open connections from said switch through said old to the motor of the pump position to give access to said pit and said covers being adapted to swing downward to closed horizontal position whereby to close said pit and whereby to lie substantially in the horizontal plane of the landing field so as to offer no obstruction to the free movement of an aeroplane over the field and over the covers, a hose reel rotatably mountedin one of said portions,.the axis of said reel including a pipe having a permanent connection with a flexible hose adapted to be coiled upon said reel, the other end ofsaid hose having a manually operable valve-controlled nozzle, a meter in another one of said portions and having a permanent connection to the axial pipe of said reels, said meter being in position to be observable when the cover of said portion is open, and pipe connectlons from said meter passing through said pit and through the ground of the landing field and connected to the pump in the supply station, and a switch mounted in said pit and electric pit and through the ground of the landing in said supply station. 1

7. In combination with an aeroplane landing field across which aeroplanes are adapted to taxi, a supply station adjacent said field including a'gasoline reservoir and a motor 1 driven pump adapted to draw gasoline from said reservoir, a metallic box-like housing adapted to be installed in the ground, and having closure means hinged to the top thereof adapted to swing to Open position for giving access to said housing and adapted to swing to closed position to lie substantially inthe plane of the surface of the landing field so as to ofier no obstruction to the free -'movement of an aeroplane over the field. and

over the cover, said cover and housing having-cooperating portions providing a waterproof enclosure, said housing having two openings in the side thereof, one of said openings having a pipe connection passing through th ground of the field to the pump in the supp y station and the other of said openings having a connection to an electrical conduit connecting to the pump motor in the supply station, said housing having means in which a flexible hose is adapted to be coiled,

7 one end of said hose carrying a manually operable valve-controlled nozzle, a meter adapted normally to be positioned within said housing when the cover is in closed position,

and an electrical switch mechanism in said housing, a gasoline connection from one end station, a cover for said assets? of said hose to the'meter and irom the meter to the first mentioned opening in said housing, and electrical connections from the switch mechanism passing through the second opening in said housing.

8. In combination with an aeroplane landing field across which aeroplanes are adapted to taxi, a suppl station adjacent said field including a luhricant reservoir and a motor driven pump adapted to draw lubricant from said reservoir, a pit sunk in the ground of the landing field remote from said it adapted when closed to be substantially ush with the surfaceof the field so as to offer no obstruction to the free movement of the aeroplane over the field and'over the cover, said cover being adapted to be opened to give access to the pit, a lubricant dispensing'apparatus permanent-ly mounted in the pit normally below the cover level of the pit, said apparatus including a meter disposed to be readable upon opening of said cover, and a flexible hose having a valve controlled dispensing nozzle adapted to be permanently connected at one end of said meter, and pipe connection from the other end of said meter in passing from said switch passing through the pit and ground and connected with a motor drivenv pump in the supply station, and steam pipes in said supply station and passing through the ground and adjacent said hibricant pipe, and thence to the pit, said steam p pes providing a steam heating coil in said pit, and means associated with the lubricant pipe andthe steam pipes passing throu hthe ground and connecting the pit with t e supply station for confining the heat from the steam pipe to the lubricant-containing pipe.

. 9. In combination with an aeroplane landing fieldacross which aeroplanes are adapted to taxi, a supply station adjacent said field, including a gasoline reservoir, and o crating means for passing gasoline from said reservoir to a pit, a pit sunk in the of the lan ing field remote from said station, covering means for said pit adapted when closed to be substantially flush with the surface of the field so as to offer no obstruct1on to the free movement of an. aeroplane taxiing over said field and over the cover,

said covering means being adapted to be opened to give access to the pit, a gasolinev dispensing apparatus permanently mounted in the pit normally below the cover level of the pit, said apparatus including a flexible ound hose having a dispensing nozzle, said flexible hose having pipe connections passing through the pit and through the ground to the gasoline forcing means, said hose nozzle and hose being constructed and arranged to be withdrawn from said pit for discharging gasoline to aeroplanes in various positions at said pit or relatively remote therefrom, and means associated with the dispensing ap 9 paratus at the pit and including means passing through the pit and ground and connected with the liquid forcing means in the supply station for starting and stopping the operating means for passing gasoline from the reservoir to the pit and whereby the dispensing operation may be controlled from the dispensing apparatus.

In testimony whereof we have signed our names to this specification on this 5 day of May A. D. 1928.

' CLEMENT P. GRIFFITH.

CHARLES J. WORDEN. 

